BEHAVIOR OF INTERFACIAL POLYCONDENSATION ON SYNTHESIZING OF POLY(AMICESTER)S

The behavior in interfacial polycondensation of 4,4'-methylenedianilin e or 4,4'-oxydianiline (ODA) in water with dimethoxycarbonyl terephtha loyl chloride (DCMTC) in dichloromethane with benzyltriethylammonium c hloride (BTEAC) as a catalyst was examined with a Fourier transform in frared spectrophotometer, attenuated total reflectance, an ultraviolet spectrophotometer, and a scanning electron microscope. When the ratio of the DCMTC concentration to the ODA concentration was about 2 : 1, the interfacial polymer obtained had relatively high inherent viscosit y. With the addition of a suitable amount of sodium carbonate and BTEA C, the interfacial polymer obtained had relatively high inherent visco sity. The polymer film grew toward the organic phase from the interfac e region until the reaction was over. The surfaces of the films adjace nt to the water phase were composed of the polymer having a higher mol ecular weight and were denser in morphology than those of the films ad jacent to the organic phase. (C) 1996 John Wiley & Sons, Inc.